Prevx Research Division
S1.EXE
System Back DoorFree PC Cleanup from Webroot
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Associated Malware Groups
The unsafe files using this name are associated with the malware groups:
- System Back Door
- Cloaked Malware
File Behavior
S1.EXE has been seen to perform the following behavior:
- The Process is packed and/or encrypted using a software packing process
- Writes to another Process's Virtual Memory (Process Hijacking)
- Executes a Process
- Registers a Dynamic Link Library File
- This process creates other processes on disk
- Injects code into other processes
- Violates Windows/Vista Physical Memory Protection allowing it to look inside the data areas of other programs
- This Process Deletes Other Processes From Disk
- Adds a Registry Key (RUN) to auto start Programs on system start up
- Copies files
- Performs DNS look ups to resolve URL IP addresses
S1.EXE has been the subject of the following behavior:
- Added as a Registry auto start to load Program on Boot up
- Executed as a Process
- Created as a process on disk
- Has code inserted into its Virtual Memory space by other programs
- Terminated as a Process
- Registered as a Dynamic Link Library File
- Executed from Temporary Folders
- Deleted as a process from disk
- Copied to multiple locations on the system
Country Of Origin
The filename S1.EXE was first seen on Oct 15 2007 in the following geographical regions of the Webroot community:
- Australia on Oct 15 2007
- Spain on Aug 14 2009
- Italy on Aug 14 2009
- The United States on Nov 13 2009
- Vietnam on Feb 26 2010
- Kenya on Mar 22 2010
- Chile on Mar 22 2010
- Turkey on May 16 2012
File Name Aliases
S1.EXE can also use the following file names:
- GED.EXE
- HERSS.EXE
- AUTORUN.INF
- TGT.EXE
- HEX1.EXE
- ERASEME_43278.EXE
- WINLOG.EXE
- S1CA77MDTB.EXE
- S1[1].EXE
- A2[1].EXE
- B2.EXE
- A2.EXE
- AM.EXE
- SA1.EXE
- A3_001.EXE
- A2_001.EXE
- A2_009.EXE
- A2_003.EXE
- A2_005.EXE
- A2_006.EXE
- A2_004.EXE
- A2_007.EXE
- A2_002.EXE
- A2_008.EXE
- A2_010.EXE
- A2_011.EXE
Filesizes
The following file size has been seen:
- 98,816 bytes
- 57,344 bytes
- 836,480 bytes
- 194,048 bytes
- 22,528 bytes
- 312,564 bytes
File Type
The filename S1.EXE refers to many versions of an executable program.
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